1. ospf:--------------------------------------------------
AGENCIA2>ena
AGENCIA2#configure terminal
AGENCIA2(config)#router ospf 1
AGENCIA2(config-router)#network 172.16.14.0 0.0.0.255 area 0
AGENCIA2(config-router)#network 172.16.15.24 0.0.0.3 area 0
AGENCIA2(config-router)#network 172.16.15.32 0.0.0.3 area 0
AGENCIA2(config-router)#end
interfaces:--------------------------------------------
Router>enable
Router#configure terminal
Router(config)#hostname AGENCIA1
AGENCIA1(config)#interface FastEthernet0/0
AGENCIA1(config-if)#no shutdown
AGENCIA1(config-if)#ip address 172.16.12.1 255.255.0.0
AGENCIA1(config-if)#ip address 172.16.12.1 255.255.254.0
AGENCIA1(config-if)#
AGENCIA1(config-if)#end
inter vlan:-------------------------------------------
CORK(config-subif)#encapsulation dot1Q 20
CORK(config-subif)#ip address 172.16.4.1 255.255.252.0
CORK(config-subif)#no shutdown
CORK(config-subif)#exit
CORK(config)#interface fastEthernet 0/0.30
CORK(config-subif)#encapsulation dot1Q 30
CORK(config-subif)#ip address 172.16.8.1 255.255.252.0
CORK(config-subif)#no shutdown
CORK(config-subif)#end
NAT:--------------------------------------------------
BELFAST(config)#ip nat inside source static 192.168.20.1 209.165.200.9
BELFAST(config)#end
BELFAST(config)#interface serial 0/0/1
BELFAST(config-if)#ip nat outside
BELFAST(config-if)#interface fa0/0
BELFAST(config-if)#ip nat inside
ip nat pool My-nat 209.165.200.10 209.165.200.14 netmask 255.255.255.248
ip nat inside source list NAT pool My-nat
ip access-list extended NAT
permit ip 192.168.10.0 0.0.0.255 any
permit ip 192.168.11.0 0.0.0.255 any
permit ip 192.168.20.0 0.0.0.255 any
Frame RElay:
AGENCIA2(config)#interface serial 2/0
AGENCIA2(config-if)#encapsulation frame-relay
exit
AGENCIA2(config)#interface serial 2/0.120 point to point
AGENCIA2(config-subif)#ip address 172.16.100.9 255.255.255.252
AGENCIA2(config-subif)#frame-relay interface-dlci 120
exit
Para el switch:

2. Switch(config)#interface range fa0/2-4
Switch(config-if-range)#switchport access vlan 10
Switch(config-if-range)#exit
Switch(config)#interface range fa0/5-8
Switch(config-if-range)#switchport access vlan 20
Switch(config-if-range)#exit
Switch(config)#interface range fa0/9-12
Switch(config-if-range)#switchport access vlan 30
Switch(config-if-range)#end
Switch(config)#interface FastEthernet0/1
Switch(config-if)#switchport trunk native vlan 1
Switch(config-if)#no shutdown
Switch(config-if)#end
Para autentificacion PPP con chap:---------------------------
ISP>ena
ISP#configure terminal
ISP(config)#username R3 password cisco
ISP(config-if)#interface serial 2/0
ISP(config-if)#encapsulation ppp
ISP(config-if)#ppp authentication chap
ISP(config-if)#end
R2(config)#username ISP password cisco
R2(config)#int s0/0/1
R2(config-if)#encapsulation ppp
R2(config-if)#ppp authentication chap
R2(config)#end
Para ACL:----------------------------------
CORK#ena
CORK#configure terminal
CORK(config)#access-list 101 remark Permite q la vlan3 tenga acceso a
web,telnet,smnp.
CORK(config)#access-list 101 permit tcp 172.16.8.0 0.0.3.255 any eq 23
CORK(config)#access-list 101 permit tcp 172.16.8.0 0.0.3.255 any eq 80
CORK(config)#access-list 101 permit tcp 172.16.8.0 0.0.3.255 any eq 25
CORK(config)#access-list 101 permit tcp 172.16.8.0 0.0.3.255 any eq 7
CORK(config)#access-list 100 permit ip any any
CORK(config)#end
CORK(config)#interface fastEthernet 0/0.30
CORK(config-subif)#ip access-group 101 in
CORK(config-subif)#end
ISP# ena
ISP#conf
ISP#configure
ISP(config)#access-list 102 remark Permite todo el trafico desde vlan1 y
servidor
ISP(config)#access-list 102 permit ip 172.16.15.5 0.0.0.15 192.168.1.0 0.0.0.255
ISP(config)#access-list 102 permit ip 172.16.0.0 0.0.3.255 192.168.1.0 0.0.0.255
ISP(config)#access-list 102 permit ip any any
ISP(config)#access-list 103 remark Permite solo responder pings a las 2 agencias
ISP(config)#access-list 103 permit tcp 192.168.1.0 0.0.0.255 172.16.12.0
0.0.1.255 eq
ISP(config)#access-list 103 permit tcp 192.168.1.0 0.0.0.255 172.16.12.0
0.0.1.255 eq 7
ISP(config)#access-list 103 permit tcp 192.168.1.0 0.0.0.255 172.16.14.0
0.0.0.255 eq 7
ISP(config)#access-list 103 permit ip any any

3. ISP(config)#end
Para DHCP: --------------------------------------
Router(config)#ip dhcp excluded-address 192.0.0.1(gateway)
Router(config)#ip dhcp excluded-address 192.0.1.1
Router(config)#ip dhcp pool Rango1
Router(dhcp-config)#network 192.0.0.0 255.255.255.240 (direccion de red)
Router(dhcp-config)#dns-server 192.168.1.18
Router(dhcp-config)#default-router 192.0.0.1(gateway)
Router(config)#ip dhcp pool Rango2
Router(dhcp-config)#network 192.0.1.1 255.255.255.240
Router(dhcp-config)#dns-server 192.168.1.1
Router(dhcp-config)#default-router 192.0.1.1
--- En caso de que se necesite Administrar DHCP por medio de otro router: ----
Router1(config)#interface fastEthernet 0/0
Router1(config-if)#ip helper-address 172.16.100.9 (a la q solicita en frame
relay)
Router1(config-if)#end